Sphere MP-1 Mk.3.3 Owner'S Manual Download Page 10

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WARRANTY REGISTRATION FORM

IMPORTANT: This form must be filled out and returned to ATMA-SPHERE MUSIC
SYSTEMS within 10 days of purchase to validate the warranty! Please type or
print clearly.

NAME__________________________________________________________________________

Address_______________________________________________________________________

City or town ____________________________________State______zip code__________

Country_______________________________________________________________________

Name of dealership____________________________________________________________

MP-1 Mk. 3.3

Date of purchase_____________serial #___________price paid_________

Optional section for our records and information:

Comments concerning your dealer_______________________________________________

Comments concerning this product _____________________________________________

_____________________________________________________________________________

list the components in your system____________________________________________

______________________________________________________________________________

comments, suggestions_________________________________________________________

______________________________________________________________________________

MAIL TO: ATMA-SPHERE MUSIC SYSTEMS, 1742 Selby Av., St. Paul, MN 55104 USA

Summary of Contents for MP-1 Mk.3.3

Page 1: ...1742 Selby Av St Paul MN 55104 651 690 2246 atma sphere com ATMA SPHERE MUSIC PREAMPLIFIER model MP 1 Mk 3 3 OWNER S MANUAL Please study this document carefully before using equipment RoHS ...

Page 2: ......

Page 3: ... tube design in the world that also supports the 600 ohm standard Every part of the preamplifier has been extensively tested and engineered so the product will perform flawlessly for years to come with little if any service Please read the manual carefully and follow the instructions closely If you have any questions do not hesitate to contact your dealer and always feel free to contact us at ATMA...

Page 4: ...btain a return authorization number from ATMA SPHERE MUSIC SYSTEMS You are responsible for transporting the unit to ATMA SPHERE MUSIC SYSTEMS 1742 Selby Av St Paul Minn 55104 You must pay the initial shipping charges but ATMA SPHERE MUSIC SYSTEMS will pay the return charges if the repairs are covered by the warranty All products MUST be shipped in the original carton s or in replacement cartons su...

Page 5: ...fier to warm up and stabilize before energizing your power amplifiers Muting circuits interfere with sound quality and the servo circuits in the line stage section Although the DC offsets generated during warmup are low level this may be a problem for some amplifiers and speakers WARNING DO NOT TURN ON THE AMPLIFIERS IN YOUR SYSTEM UNTIL THE PREAMPLIFIER IS STABILIZED DAMAGE TO SPEAKERS AMPLIFIERS...

Page 6: ...on to BOTH channels 2 Pin number one of any XLR connection should always be ground as per industry standard 3 Pin two of the XLR phono input corresponds to the or non inverting output of the cartridge and pin three is the or inverting output of the cartridge absolute system phase can be corrected from the front panel 4 There is no need for an independent ground wire from the arm to the preamp If y...

Page 7: ...put and may be used with any single ended line source A note on tubes As mentioned previously avoid NOS 12AT7s Older 6SN7s on the other hand can often provide some improved performance Only buy from a reputable vendor with proper assurance that the tubes can be returned if they are unsatisfactory We advise that you do not go overboard with NOS tube types as the prices paid for the results can be h...

Page 8: ...ardous or lethal voltages are present with the cover removed Refer service to qualified service personnel Noisy phono section Replace the 12AT7s in the phono section AVOID NOS New Old Stock TYPES AT ALL COST Despite claims to the contrary by NOS tube suppliers all NOS 12AT7s are just too noisy if you intend to use low output moving coil cartridges Mullard Telefunken don t care They are too noisy T...

Page 9: ...ion damping platform NavCom Silencers or other anti vibration pads can be helpful as are tube damping rings Most cartridges with more than 0 15mv seem to work fine The higher the output the better tempered with a musical presentation Some recommended choices The Grado Statement and Master Reference Lyra series Dynavector and Micro Benz There are of course many others If a high output cartridge is ...

Page 10: ...ncerning your dealer_______________________________________________ Comments concerning this product _____________________________________________ _____________________________________________________________________________ list the components in your system____________________________________________ ______________________________________________________________________________ _________________...

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